s390/sclp: introduce check for SIE

This patch adds a way to check if the SIE with zArchitecture support is
available.

Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

2 files changed, 6 insertions, 1 deletions

diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index 8324abbdaeaf..dea883f85d66 100644
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -29,7 +29,10 @@ struct sclp_ipl_info {
 
 struct sclp_core_entry {
         u8 core_id;
-        u8 reserved0[2];
+        u8 reserved0;
+        u8 : 4;
+        u8 sief2 : 1;
+        u8 : 3;
         u8 : 3;
         u8 siif : 1;
         u8 sigpif : 1;
@@ -55,6 +58,7 @@ struct sclp_info {
         unsigned char has_sprp : 1;
         unsigned char has_hvs : 1;
         unsigned char has_esca : 1;
+        unsigned char has_sief2 : 1;
         unsigned int ibc;
         unsigned int mtid;
         unsigned int mtid_cp;
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index ff1e1bb8144d..e0a1f4eec370 100644
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -136,6 +136,7 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
                         continue;
                 sclp.has_siif = cpue->siif;
                 sclp.has_sigpif = cpue->sigpif;
+                sclp.has_sief2 = cpue->sief2;
                 break;
         }